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수용액에서 실리카 표면에 대한 철이온(II)의 흡착거동
Adsorption Behavior of Fe(II) on Silica Surface in Aqueous Solutions
성균관대학교 화학공학과, 수원 440-746
Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
HWAHAK KONGHAK, April 2001, 39(2), 190-194(5), NONE
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Abstract
본 연구에서는 실리카를 이용하여 수용액으로부터 철이온(Ⅱ)을 효율적으로 제거할 수 있는 조건을 구명하기 위해 철이온의 흡착거돈과 pH의 영향에 대해 회분식과 연속식 방법으로 실험을 실시했다. pH 2에서는 흡착량이 적었지만 pH 2-2.5의 범위에서 흡착량이 급격히 증가했고 pH 2.5-3에서 완만하게 흡착량이 증가했으며 pH 3-9에서는 균일한 흡착량을 나타냈다. 실리카 표면에 대한 철이온(Ⅱ)의 흡착에서, Freundlich 흡착등온식이 Langmuir 흡착등온식보다 더 적합했으며 Lagergren 흡착속도식으로 철이론(Ⅱ)의 흡착특성을 나타낼 수 있었다.
The adsorption behavior of a iron ion(II) on the silica under the various pH conditions were performed in the batch and continuous systems in order to study the efficient removal conditions of a iron ion from aqueous solutions. The adsorption amount was very small at pH 2 but rapidly increased in pH 2-2.5 and slowly in pH 2.5-3. That was constant regardless of pH value in region of pH 3-9. In adsorption of a iron ion(II) on the silica surface, Freundlich adsorption isotherm was more suitable than Langmuir adsorption isotherm and the adsorption characteristics could be explained by using Lagergren adsorption rate.
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Linstedt KD, Houck CO, O'Connor JT, J. Water Pollut. Control Fed., 43(7), 1507 (1971)
Shen YS, J. Am. Water Works Assoc., 65(8), 543 (1973)
Webber WJ, Hopkins CB, Bloom R, J. Water Pollut. Control Fed., 42(1), 83 (1970)
Nowack B, Sigg L, J. Colloid Interface Sci., 177(1), 106 (1996)
Onganer Y, Temur C, J. Colloid Interface Sci., 205(2), 241 (1998)
Loewenstein LM, Charpin F, Mertens PW, J. Electrochem. Soc., 146(2), 719 (1999)
Zaporozhets O, Gawer O, Sukhan V, Colloids Surf., A147, 273 (1999)
Mottatt WG, Pearsall GW, Wulff J, "The Structure and Properties of Materials," 3(rd) ed., John Wiley & Sons., Inc., New York, NY (1967)
Kass RL, Kardos JL, Polym. Eng. Sci., 11(1), 11 (1971)
James RO, Healy TW, J. Colloid Interface Sci., 40(1), 42 (1972)
Bijsterbosch BH, J. Colloid Interface Sci., 47(1), 186 (1974)
Spark KM, Johnson BB, Wells JD, Eur. J. Soil. Sci., 46, 621 (1995)
Kho JG, Jeong AY, Moon YT, Kim DP, J. Korean Ind. Eng. Chem., 11(1), 1 (2000)
Kim MS, Chung JG, J. Colloid Interface Sci., 233(1), 31 (2001)
Hitachi Ltd.: "Analysis Guide for Polarized Zeeman Atomic Absorption Spectrophotometry," Hitachi Ltd., Tokyo (1987)
Weber TW, Chakravorti RK, AIChE J., 20, 228 (1974)
Sharma YC, J. Colloid Interface Sci., 233(2), 265 (2001)
